His death date is given in the baptismal record of his posthumous daughter, Eve.

Some of his notarial registers have survived (ACV DL 53, FHL microfilm #0922551), showing that he wrote his name as Jaqueri. This spelling was also used in the next generation, more or less interchangeably with Jaquier and occasionally Jacquier. The registers contain important documents relating to the Dutoit family and many others, 1557-1583. His first wife is mentioned in a document dated 22 oct 1568, regarding a woodlot partitioned between different branches of the Dutoit family. Evidently Sara Demont, the notary's wife, owned a neighboring tract. He is cited as secrétaire de Moudon in January, 1583. Hence, it is very likely his son-in-law Michel Frossard who was the next secrétaire de Moudon, and not the other Michel Frossard, son of Jean.